Samsung Galaxy Camera 2 User Manual (en)

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Camera: Basic functions
59
Using the focus lock
Half-press the Shutter button to focus. When the subject is focused, you can change the 
composition. When you are ready, press the Shutter button to take the photo.
When taking photos in low-light conditions
•  Turn the flash on to take photos in low-light conditions. (p. 83)
•  Adjust the ISO sensitivity. (p. 78)